The terms 'node' and 'tree' are not used elsewhere in the product currently ('page' and 'document'/'guide' are used instead). Having said that however, it does appear that 'nodes' and 'trees' and 'subtrees' are understood by most users. I'll have a look at other outliner products, and check what terms they use in their UI and documentation.

The plan is to release a v1.6 release candidate in May. The final version should also be out in May, unless there are serious bugs.

@Patricio: I'd like to finish auto save and auto backup, and then take up sort. Hopefully these three should get finished by this month end (assuming no major technical issues turn up and no crises at my day job!). That should be feature complete for v1.6., and I guess we should make a release candidate with that.

@Dejan: Thanks. There are more (see previous comment for a list), hopefully I blog about them before the version is released!